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Bumped into this while poking around YouTube. An exemplary build of a Trimet BEAMbot, as covered in my BEAM projects in MAKE Volume 06. The near-perfect symmetry of the construction (often overlooked by some builders) leads to a really smooth, consistent motion. The builder used 1000 uF caps and the FLED (Flashing LED) variant of the Miller Solar Engine. More pics of this and other BEAM robots at the Flickr link below.

Related:

  • BEAM coverage on MAKE: Blog – Link

Beam bots – Link

From the pages of MAKE:
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